A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5985-01-559-1900
NSN 6135-01-529-3789
NSN 6320-00-521-9350
NSN 6105-01-602-4501
NSN 5975-00-907-2909
NSN 2925-00-312-8568
NSN 6645-01-549-8910
NSN 6620-00-907-9756
NSN 2925-00-732-9254
NSN 5930-00-975-4248
NSN 5895-01-250-2813
NSN 6105-00-827-7308